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Proceedings Paper

All-spherical catadioptric system for 0.8m F/4.5 astronomical telescope: Can we compete with the Ritchey-Chrétien design?
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Paper Abstract

Aspherical surfaces are difficult to manufacture, therefore we consider a possibility of using only spherical surfaces. Two optical designs for 800-mm F/4.5 seeing limited telescope are considered: Ritchey-Chrétien and a two-mirror Catadioptric system. The Ritchey-Chrétien system has a hyperboloidal primary mirror, a planoid aspheric secondary mirror, and a two-lens field corrector, whereas the all-spherical system contains a Mangin mirror and a meniscus corrector as the secondary group and a three-lens corrector. Our analysis of the image quality achieved in the two designs shows that the all-spherical catadioptric system is an acceptable alternative to the Ritchey-Chrétien design.

Paper Details

Date Published: 7 September 2010
PDF: 5 pages
Proc. SPIE 7652, International Optical Design Conference 2010, 76520L (7 September 2010); doi: 10.1117/12.868909
Show Author Affiliations
Mehdi Baharmi, National Univ. of Ireland, Galway (Ireland)
Alexander V. Goncharov, National Univ. of Ireland, Galway (Ireland)
Christopher Dainty, National Univ. of Ireland, Galway (Ireland)


Published in SPIE Proceedings Vol. 7652:
International Optical Design Conference 2010
Julie Bentley; Anurag Gupta; Richard N. Youngworth, Editor(s)

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